Winter Springs High School in Seminole County was evacuated Monday morning after someone called in a bomb threat, according to Seminole County Public School officials.

Students and staff were instructed to leave at 7:24 a.m. after someone called the school and claimed that there was a bomb on campus and that the staff had one hour to "get everyone out," Winter Springs police said.

Bomb-sniffing K9s from the University of Central Florida, Orlando-Sanford International Airport and Orlando International Airport arrived at the scene to investigate the threat but found nothing, police said

Students were instructed to return to class shortly after 9 a.m.

Investigators are calling the incident "nonsense."

"We don’t know right now, but it’s very possible that it could be someone who's attending, attended or a juvenile. When we catch the person, and we will, this person will be charged with a felony, and this felony will remain with them for the rest of their lives over a simple little prank," Winter Springs police Chief Kevin Brunelle said.

School officials said the incident will not keep them from rescheduling the FSA.

“We will be under the gun, most definitely, but yes, we will be able to reschedule this test,” Seminole County Public Schools official Michael Lawrence said.

Homeland Security is assisting the Winter Springs Police Department in tracking down the caller.